LCD MAG MODEL 3200 -RX326

[WILLYAM1]

HI EVERYONE.
problem no led in front(POWER ON LED).
p.s is always working 12v ok 24v ok(pin power on is always on 3.9v).
MAIN BOARD VALTAGE; 5V  3.3V 2.5V 1.8V ALL OK.
Ithink micropros or eeprom??? .
anyone hade asame problem.
main board no' is 200-100hx276-e.
inverter dont work no backlight.
willyam1